Hi! When downloading substitutes via wireless connection, several times I encountered a case where the host name of hydra cannot be resolved. So, the "guix system init" fails and suggests the use of "--fallback" option. However, rather than continuing with "guix system --fallback init", one should actually try "dhclient -v WIRELESS_INTERFACE_NAME" first and then do "guix system init" again instead of "guix system --fallback init". My installation process is now going well with this strategy. Previously, I kept using "--fallback" that didn't solve the problem due to network connectivity error because using "--fallback" brought up built errors. -- Best regards, Eus (FSF member #4445) In this digital era, where computing technology is pervasive, your freedom depends on the software controlling those computing devices. Join free software movement today! It is free as in freedom, not as in free beer! Join: http://www.fsf.org/jf?referrer=4445